1、BRITISH STANDARD AEROSPACE SERIES BS L 154: 1977 Incorporating Amendment Nos. 1 and 2 Specification for Ingots and castings of aluminium-copper- silicon alloy (Solution treated and aged at room temperature) (Cu 4, Si 1) UDC 629.7:669.7153782 14 153.71 157.83 975BS L 154:1977 This British Standard, h
2、aving been prepared under the directionof the Aerospace Standards Committee, was published under the authority ofthe Executive Board on 31January1977 BSI 01-2000 The following BSI references relate to the work on this standard: Committee reference ACE/27 Draft for comment 76/70247 DC ISBN 0 580 0997
3、0 9 A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document compri
4、ses a front cover, an inside front cover, pagesiandii, page1and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date of is
5、sue Comments 3737 September 1981 6546 April 1991 Indicated by a sideline in the marginBS L 154:1977 BSI 01-2000 i Contents Page 1 Inspection and testing procedure 1 2 Chemical composition 1 3 Heat treatment 1 4 Mechanical properties 1 5 Grain size 1ii blankBS L 154:1977 BSI 01-2000 1 NOTEIngots and
6、castings of this composition but solution treated and artificially aged are covered by BSL155. 1 Inspection and testing procedure This British Standard shall be used in conjunction with the relevant sections of the latest issue of BSL101 as follows. 2 Chemical composition 2.1 The chemical compositio
7、n of the ingots and castings shall be: 2.2 The ingots and castings shall be grain refined with titanium or with titanium and boron. The ingot maker shall declare the grain refining element(s) used. 3 Heat treatment 3.1 The castings and test samples shall be heat treated together as follows: a) solut
8、ion treat at a temperature of510 5 C for not less than16h; b) quench into water at a temperature of50 C to70 C or in a polymer quenchant at a temperature not greater than30 C; NOTEThe use of polymer quenchant as an alternative to water should be agreed by the purchaser. c) cool in air. 3.2 Where a p
9、olymer quenchant has been used in3.1 b), the nature of the quenchant shall be defined on the certificate of conformity for the castings. 4 Mechanical properties 4.1 Tensile test NOTEThe tensile test values specified for test pieces machined from separately cast test samples may not be realized in ce
10、rtain portions of castings. The mechanical properties obtained from separately cast test samples, selected and prepared in accordance with the relevant requirements of BSL101, shall be not less than the following values. NOTEInformation on SI units is given in BS3763 “The International System of uni
11、ts (SI)” and BS350 “Conversion factors and tables”. 4.2 Hardness test. The hardness of castings heat treated with unrelated test samples, in accordance with clause3, shall be not less than the following values: NOTEThe specified value may not be achieved until after30days at room temperature. 5 Grai
12、n size The grain size of the castings shall be as uniform as possible and preferably not greater than0.20mm. Ingots sections 1 and 2 Castings not subject to cut-up testing sections 1 and 3 Castings subject to cut-up testing sections 1 and 4 Element % min. max. Silicon 1.0 1.5 Iron 0.25 Copper 3.8 4.
13、5 Manganese 0.1 Magnesium 0.10 Nickel 0.1 Zinc 0.1 Titanium 0.05 0.25 Lead 0.05 Tin 0.05 Others each 0.05 Others total 0.15 Aluminium Remainder Test sample 0.2 % proof stress a Tensile strength Elongation MPa (= N/mm 2 ) MPa (= N/mm 2 ) % Sand cast 160 215 7 Chill cast 165 265 13 a The specified val
14、ue may not be achieved until after 30 days at room temperature. Sand cast 70 HB Chill cast 80 HBBS L 154: 1977 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the UK view on standards
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